【摘要】 为进一步研究砖砌体结构的抗地震倒塌性能,针对其抗震计算分析方法,梳理并总结常用的宏观计算模型,明确等效框架模型和三弹簧单元模型均能用于非线性动力时程分析,且在结合砖墙的恢复力模型后能获得不同区域构件的破坏情况及宏观响应,并指出后者具备更好的适用性。在此基础上,介绍砖砌体材料的二维破坏准则,并提出采用修正Drucker-Prager准则对其进行模拟以获得砖墙构件的滞回曲线,进而实现快速构建砖墙的恢复力模型。分别将5个砖墙试件在低周往复荷载作用下得到的实测滞回曲线与计算值相比较,结果吻合程度均较好,从而验证上述方法的有效性。更多还原

【Abstract】 In order to investigate the collapse resistance behavior of brick masonry structures in earthquakes,the common macro mathematical models corresponding to non-linear dynamic time-history analysis were summarized. Both equivalent frame model and three spring elements model,the latter of which is more applicable,are suitable for nonlinear dynamic time-history analysis for obtaining local damage state and macro response in combination with restoring force model. On this basis,the failure criterion of brick masonry under biaxial stress was introduced,and the method of simulating hysteretic curves via modified Drucker-Prager criterion was proposed for building restoring force models quickly. Comparing the experimental hysteretic curves of 5 brick masonry specimens under reversed cyclic loading with calculational curves,the adaptability of proposed method was verified by their consistency.更多还原